Moving Charges And Magnetism Mock Tests

A charged particle moves along a straight line in a region with a magnetic field. This implies that the magnetic field in that region is:

According to the Biot-Savart law, the magnetic field dB at a distance r from a small current element Idl⃗ is proportional to:

An electron and a proton enter a uniform magnetic field perpendicularly with the same kinetic energy. The ratio of the radii of their circular paths (r_e/r_p) is:

A charged particle moves along a straight line in a region with a magnetic field. This implies that:

A charged particle moves along a magnetic field line. The force on it is:

A charged particle moves into a region of uniform magnetic field perpendicular to its velocity. The path traced by the particle is:

Two long straight parallel wires carry currents I and 2I in the same direction and are separated by distance d. The magnetic field at a point between the wires where the net field is zero is at a distance from the wire carrying current I:

Two long straight parallel wires carry currents I₁ and I₂ in the same direction. If I₁ = 2I₂, the force per unit length between them is attractive with magnitude: